./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/list-ext_flag.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/list-ext_flag.i -s /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0d1331ff6e93d99c9a0972b6d5580bf2c78fcc5 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 09:12:11,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 09:12:11,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 09:12:11,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 09:12:11,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 09:12:11,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 09:12:11,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 09:12:11,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 09:12:11,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 09:12:11,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 09:12:11,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 09:12:11,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 09:12:11,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 09:12:11,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 09:12:11,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 09:12:11,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 09:12:11,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 09:12:11,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 09:12:11,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 09:12:11,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 09:12:11,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 09:12:11,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 09:12:11,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 09:12:11,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 09:12:11,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 09:12:11,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 09:12:11,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 09:12:11,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 09:12:11,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 09:12:11,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 09:12:11,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 09:12:11,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 09:12:11,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 09:12:11,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 09:12:11,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 09:12:11,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 09:12:11,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 09:12:11,223 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 09:12:11,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 09:12:11,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 09:12:11,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 09:12:11,225 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 09:12:11,238 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 09:12:11,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 09:12:11,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 09:12:11,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 09:12:11,240 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 09:12:11,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 09:12:11,240 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 09:12:11,240 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 09:12:11,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 09:12:11,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 09:12:11,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 09:12:11,241 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 09:12:11,241 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 09:12:11,241 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 09:12:11,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 09:12:11,242 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 09:12:11,242 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 09:12:11,242 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 09:12:11,243 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 09:12:11,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 09:12:11,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 09:12:11,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 09:12:11,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 09:12:11,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 09:12:11,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 09:12:11,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 09:12:11,244 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 09:12:11,245 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 09:12:11,245 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 09:12:11,245 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0d1331ff6e93d99c9a0972b6d5580bf2c78fcc5 [2019-11-20 09:12:11,378 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 09:12:11,388 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 09:12:11,391 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 09:12:11,392 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 09:12:11,393 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 09:12:11,393 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/../../sv-benchmarks/c/list-ext-properties/list-ext_flag.i [2019-11-20 09:12:11,441 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/data/049c0e4e5/c26201375e0f4a1aa95568bf9c87e850/FLAGf8edcf794 [2019-11-20 09:12:11,980 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 09:12:11,983 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/sv-benchmarks/c/list-ext-properties/list-ext_flag.i [2019-11-20 09:12:12,002 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/data/049c0e4e5/c26201375e0f4a1aa95568bf9c87e850/FLAGf8edcf794 [2019-11-20 09:12:12,413 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/data/049c0e4e5/c26201375e0f4a1aa95568bf9c87e850 [2019-11-20 09:12:12,416 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 09:12:12,417 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 09:12:12,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 09:12:12,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 09:12:12,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 09:12:12,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:12:12" (1/1) ... [2019-11-20 09:12:12,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3409c829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:12, skipping insertion in model container [2019-11-20 09:12:12,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:12:12" (1/1) ... [2019-11-20 09:12:12,447 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 09:12:12,488 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 09:12:12,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 09:12:12,873 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 09:12:12,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 09:12:13,029 INFO L192 MainTranslator]: Completed translation [2019-11-20 09:12:13,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:13 WrapperNode [2019-11-20 09:12:13,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 09:12:13,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 09:12:13,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 09:12:13,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 09:12:13,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:13" (1/1) ... [2019-11-20 09:12:13,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:13" (1/1) ... [2019-11-20 09:12:13,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:13" (1/1) ... [2019-11-20 09:12:13,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:13" (1/1) ... [2019-11-20 09:12:13,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:13" (1/1) ... [2019-11-20 09:12:13,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:13" (1/1) ... [2019-11-20 09:12:13,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:13" (1/1) ... [2019-11-20 09:12:13,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 09:12:13,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 09:12:13,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 09:12:13,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 09:12:13,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 09:12:13,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 09:12:13,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 09:12:13,167 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 09:12:13,167 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 09:12:13,167 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-20 09:12:13,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-20 09:12:13,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-20 09:12:13,168 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-20 09:12:13,168 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 09:12:13,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 09:12:13,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 09:12:13,169 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 09:12:13,169 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 09:12:13,169 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 09:12:13,169 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 09:12:13,169 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 09:12:13,170 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 09:12:13,170 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 09:12:13,170 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 09:12:13,170 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 09:12:13,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 09:12:13,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 09:12:13,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 09:12:13,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 09:12:13,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 09:12:13,172 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 09:12:13,172 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 09:12:13,172 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 09:12:13,172 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 09:12:13,172 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-20 09:12:13,172 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-20 09:12:13,173 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-20 09:12:13,173 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 09:12:13,173 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 09:12:13,173 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 09:12:13,173 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 09:12:13,173 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 09:12:13,174 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 09:12:13,174 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 09:12:13,174 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 09:12:13,174 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 09:12:13,174 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 09:12:13,174 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 09:12:13,175 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 09:12:13,175 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 09:12:13,175 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 09:12:13,175 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 09:12:13,175 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 09:12:13,176 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 09:12:13,176 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 09:12:13,176 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 09:12:13,176 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 09:12:13,176 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 09:12:13,176 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 09:12:13,177 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 09:12:13,177 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 09:12:13,177 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 09:12:13,177 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 09:12:13,177 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 09:12:13,177 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 09:12:13,178 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 09:12:13,178 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 09:12:13,178 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 09:12:13,178 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 09:12:13,178 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 09:12:13,178 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 09:12:13,179 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 09:12:13,179 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 09:12:13,179 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 09:12:13,179 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 09:12:13,179 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 09:12:13,179 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 09:12:13,180 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 09:12:13,180 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 09:12:13,180 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 09:12:13,180 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 09:12:13,180 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 09:12:13,181 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 09:12:13,181 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 09:12:13,181 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 09:12:13,181 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 09:12:13,181 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 09:12:13,181 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 09:12:13,182 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 09:12:13,182 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 09:12:13,182 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 09:12:13,182 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 09:12:13,182 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 09:12:13,182 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 09:12:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 09:12:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 09:12:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 09:12:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 09:12:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 09:12:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 09:12:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 09:12:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 09:12:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 09:12:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 09:12:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 09:12:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 09:12:13,185 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 09:12:13,185 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 09:12:13,185 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 09:12:13,185 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 09:12:13,185 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 09:12:13,185 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 09:12:13,186 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 09:12:13,186 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 09:12:13,186 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 09:12:13,186 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 09:12:13,186 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 09:12:13,186 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 09:12:13,187 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 09:12:13,187 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 09:12:13,187 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 09:12:13,187 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 09:12:13,187 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 09:12:13,187 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-20 09:12:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 09:12:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 09:12:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 09:12:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 09:12:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 09:12:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 09:12:13,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 09:12:13,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 09:12:13,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 09:12:13,458 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-20 09:12:13,894 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 09:12:13,895 INFO L285 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-20 09:12:13,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:12:13 BoogieIcfgContainer [2019-11-20 09:12:13,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 09:12:13,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 09:12:13,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 09:12:13,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 09:12:13,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:12:12" (1/3) ... [2019-11-20 09:12:13,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b552076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:12:13, skipping insertion in model container [2019-11-20 09:12:13,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:13" (2/3) ... [2019-11-20 09:12:13,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b552076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:12:13, skipping insertion in model container [2019-11-20 09:12:13,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:12:13" (3/3) ... [2019-11-20 09:12:13,907 INFO L109 eAbstractionObserver]: Analyzing ICFG list-ext_flag.i [2019-11-20 09:12:13,922 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 09:12:13,929 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 37 error locations. [2019-11-20 09:12:13,936 INFO L249 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2019-11-20 09:12:13,957 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 09:12:13,957 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 09:12:13,957 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 09:12:13,957 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 09:12:13,957 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 09:12:13,957 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 09:12:13,957 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 09:12:13,957 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 09:12:13,973 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states. [2019-11-20 09:12:13,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 09:12:13,985 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:12:13,986 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:12:13,987 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 09:12:13,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:12:13,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1548711624, now seen corresponding path program 1 times [2019-11-20 09:12:13,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 09:12:14,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [863266191] [2019-11-20 09:12:14,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:12:14,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-20 09:12:14,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:12:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:12:14,206 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 09:12:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:12:14,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [863266191] [2019-11-20 09:12:14,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:12:14,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 09:12:14,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879746275] [2019-11-20 09:12:14,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 09:12:14,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 09:12:14,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 09:12:14,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 09:12:14,245 INFO L87 Difference]: Start difference. First operand 90 states. Second operand 2 states. [2019-11-20 09:12:14,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:12:14,266 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2019-11-20 09:12:14,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 09:12:14,267 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-20 09:12:14,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:12:14,276 INFO L225 Difference]: With dead ends: 90 [2019-11-20 09:12:14,276 INFO L226 Difference]: Without dead ends: 82 [2019-11-20 09:12:14,277 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 09:12:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-20 09:12:14,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-11-20 09:12:14,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-20 09:12:14,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2019-11-20 09:12:14,315 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 10 [2019-11-20 09:12:14,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:12:14,316 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2019-11-20 09:12:14,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 09:12:14,316 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2019-11-20 09:12:14,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 09:12:14,316 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:12:14,317 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:12:14,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:14,520 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 09:12:14,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:12:14,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1548710446, now seen corresponding path program 1 times [2019-11-20 09:12:14,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 09:12:14,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1673082424] [2019-11-20 09:12:14,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:12:14,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 09:12:14,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:12:14,733 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 09:12:14,734 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:12:14,737 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:12:14,738 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 09:12:14,738 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 09:12:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:12:14,757 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 09:12:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:12:14,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1673082424] [2019-11-20 09:12:14,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:12:14,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-20 09:12:14,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803401512] [2019-11-20 09:12:14,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 09:12:14,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 09:12:14,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 09:12:14,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 09:12:14,779 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 4 states. [2019-11-20 09:12:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:12:15,137 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2019-11-20 09:12:15,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 09:12:15,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-20 09:12:15,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:12:15,140 INFO L225 Difference]: With dead ends: 92 [2019-11-20 09:12:15,140 INFO L226 Difference]: Without dead ends: 92 [2019-11-20 09:12:15,141 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 09:12:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-20 09:12:15,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2019-11-20 09:12:15,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-20 09:12:15,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2019-11-20 09:12:15,160 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 10 [2019-11-20 09:12:15,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:12:15,161 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2019-11-20 09:12:15,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 09:12:15,161 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2019-11-20 09:12:15,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 09:12:15,162 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:12:15,162 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:12:15,365 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:15,366 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 09:12:15,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:12:15,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1548710447, now seen corresponding path program 1 times [2019-11-20 09:12:15,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 09:12:15,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [531997130] [2019-11-20 09:12:15,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:12:15,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 09:12:15,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:12:15,585 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 09:12:15,586 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:12:15,592 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:12:15,592 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 09:12:15,593 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 09:12:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:12:15,620 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 09:12:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:12:15,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [531997130] [2019-11-20 09:12:15,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:12:15,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 09:12:15,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297143319] [2019-11-20 09:12:15,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 09:12:15,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 09:12:15,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 09:12:15,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 09:12:15,749 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 6 states. [2019-11-20 09:12:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:12:16,388 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2019-11-20 09:12:16,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 09:12:16,389 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-20 09:12:16,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:12:16,390 INFO L225 Difference]: With dead ends: 106 [2019-11-20 09:12:16,390 INFO L226 Difference]: Without dead ends: 106 [2019-11-20 09:12:16,391 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-20 09:12:16,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-20 09:12:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-11-20 09:12:16,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-20 09:12:16,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2019-11-20 09:12:16,407 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 10 [2019-11-20 09:12:16,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:12:16,408 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2019-11-20 09:12:16,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 09:12:16,408 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2019-11-20 09:12:16,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 09:12:16,409 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:12:16,409 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:12:16,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:16,612 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 09:12:16,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:12:16,612 INFO L82 PathProgramCache]: Analyzing trace with hash 830092300, now seen corresponding path program 1 times [2019-11-20 09:12:16,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 09:12:16,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1724519069] [2019-11-20 09:12:16,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:12:16,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 09:12:16,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:12:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:12:16,897 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 09:12:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:12:16,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1724519069] [2019-11-20 09:12:16,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:12:16,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 6 [2019-11-20 09:12:16,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096614773] [2019-11-20 09:12:16,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 09:12:16,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 09:12:16,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 09:12:16,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-20 09:12:16,926 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 7 states. [2019-11-20 09:12:17,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:12:17,201 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2019-11-20 09:12:17,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 09:12:17,201 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-11-20 09:12:17,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:12:17,202 INFO L225 Difference]: With dead ends: 100 [2019-11-20 09:12:17,202 INFO L226 Difference]: Without dead ends: 100 [2019-11-20 09:12:17,203 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-20 09:12:17,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-20 09:12:17,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2019-11-20 09:12:17,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-20 09:12:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2019-11-20 09:12:17,214 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 19 [2019-11-20 09:12:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:12:17,214 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2019-11-20 09:12:17,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 09:12:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2019-11-20 09:12:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 09:12:17,215 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:12:17,215 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:12:17,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:17,418 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 09:12:17,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:12:17,418 INFO L82 PathProgramCache]: Analyzing trace with hash 104590867, now seen corresponding path program 1 times [2019-11-20 09:12:17,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 09:12:17,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [521754662] [2019-11-20 09:12:17,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:12:17,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 09:12:17,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:12:17,633 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 09:12:17,633 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:12:17,639 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:12:17,640 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 09:12:17,640 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-20 09:12:17,681 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2019-11-20 09:12:17,682 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:12:17,684 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:12:17,685 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 09:12:17,685 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2019-11-20 09:12:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:12:17,696 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 09:12:17,746 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-20 09:12:17,746 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-20 09:12:17,752 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:12:17,752 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-20 09:12:17,752 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2019-11-20 09:12:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:12:17,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [521754662] [2019-11-20 09:12:17,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:12:17,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2019-11-20 09:12:17,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924959702] [2019-11-20 09:12:17,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 09:12:17,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 09:12:17,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 09:12:17,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-20 09:12:17,775 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand 11 states. [2019-11-20 09:12:18,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:12:18,635 INFO L93 Difference]: Finished difference Result 242 states and 257 transitions. [2019-11-20 09:12:18,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 09:12:18,639 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2019-11-20 09:12:18,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:12:18,641 INFO L225 Difference]: With dead ends: 242 [2019-11-20 09:12:18,642 INFO L226 Difference]: Without dead ends: 238 [2019-11-20 09:12:18,642 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-11-20 09:12:18,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-11-20 09:12:18,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 107. [2019-11-20 09:12:18,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-20 09:12:18,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 120 transitions. [2019-11-20 09:12:18,654 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 120 transitions. Word has length 20 [2019-11-20 09:12:18,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:12:18,654 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 120 transitions. [2019-11-20 09:12:18,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 09:12:18,654 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 120 transitions. [2019-11-20 09:12:18,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 09:12:18,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:12:18,655 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:12:18,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:18,858 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 09:12:18,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:12:18,858 INFO L82 PathProgramCache]: Analyzing trace with hash -191233763, now seen corresponding path program 1 times [2019-11-20 09:12:18,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 09:12:18,859 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1045905946] [2019-11-20 09:12:18,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:12:19,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 09:12:19,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:12:19,047 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 09:12:19,048 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:12:19,056 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:12:19,056 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 09:12:19,057 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-20 09:12:19,089 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2019-11-20 09:12:19,090 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:12:19,091 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:12:19,091 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 09:12:19,092 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2019-11-20 09:12:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:12:19,100 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 09:12:19,142 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-20 09:12:19,143 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-20 09:12:19,151 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:12:19,151 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-20 09:12:19,151 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2019-11-20 09:12:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:12:19,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1045905946] [2019-11-20 09:12:19,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:12:19,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2019-11-20 09:12:19,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964424938] [2019-11-20 09:12:19,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 09:12:19,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 09:12:19,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 09:12:19,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-20 09:12:19,170 INFO L87 Difference]: Start difference. First operand 107 states and 120 transitions. Second operand 11 states. [2019-11-20 09:12:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:12:19,972 INFO L93 Difference]: Finished difference Result 229 states and 245 transitions. [2019-11-20 09:12:19,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 09:12:19,972 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2019-11-20 09:12:19,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:12:19,974 INFO L225 Difference]: With dead ends: 229 [2019-11-20 09:12:19,974 INFO L226 Difference]: Without dead ends: 223 [2019-11-20 09:12:19,974 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-11-20 09:12:19,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-11-20 09:12:19,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 118. [2019-11-20 09:12:19,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-11-20 09:12:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 135 transitions. [2019-11-20 09:12:19,983 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 135 transitions. Word has length 20 [2019-11-20 09:12:19,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:12:19,983 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 135 transitions. [2019-11-20 09:12:19,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 09:12:19,984 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 135 transitions. [2019-11-20 09:12:19,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 09:12:19,985 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:12:19,985 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:12:20,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:20,188 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 09:12:20,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:12:20,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1145210864, now seen corresponding path program 1 times [2019-11-20 09:12:20,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 09:12:20,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1872059111] [2019-11-20 09:12:20,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:12:20,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 09:12:20,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:12:20,376 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 09:12:20,377 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:12:20,378 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:12:20,379 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 09:12:20,379 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 09:12:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:12:20,449 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 09:12:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:12:25,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1872059111] [2019-11-20 09:12:25,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:12:25,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 09:12:25,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117633957] [2019-11-20 09:12:25,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 09:12:25,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 09:12:25,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 09:12:25,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=65, Unknown=2, NotChecked=0, Total=90 [2019-11-20 09:12:25,318 INFO L87 Difference]: Start difference. First operand 118 states and 135 transitions. Second operand 10 states. [2019-11-20 09:12:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:12:25,966 INFO L93 Difference]: Finished difference Result 148 states and 166 transitions. [2019-11-20 09:12:25,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 09:12:25,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-20 09:12:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:12:25,969 INFO L225 Difference]: With dead ends: 148 [2019-11-20 09:12:25,969 INFO L226 Difference]: Without dead ends: 144 [2019-11-20 09:12:25,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=52, Invalid=128, Unknown=2, NotChecked=0, Total=182 [2019-11-20 09:12:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-11-20 09:12:25,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 122. [2019-11-20 09:12:25,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-20 09:12:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 139 transitions. [2019-11-20 09:12:25,977 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 139 transitions. Word has length 21 [2019-11-20 09:12:25,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:12:25,977 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 139 transitions. [2019-11-20 09:12:25,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 09:12:25,977 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 139 transitions. [2019-11-20 09:12:25,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 09:12:25,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:12:25,978 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:12:26,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:26,181 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 09:12:26,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:12:26,181 INFO L82 PathProgramCache]: Analyzing trace with hash 344537592, now seen corresponding path program 1 times [2019-11-20 09:12:26,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 09:12:26,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [437676860] [2019-11-20 09:12:26,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:12:26,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 09:12:26,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:12:26,353 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:12:26,354 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2019-11-20 09:12:26,354 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:12:26,376 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 09:12:26,376 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 09:12:26,377 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2019-11-20 09:12:26,392 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 09:12:26,392 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:12:26,401 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:12:26,402 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 09:12:26,402 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2019-11-20 09:12:26,424 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-11-20 09:12:26,425 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:12:26,438 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:12:26,439 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:12:26,439 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:13 [2019-11-20 09:12:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:12:26,461 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 09:12:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:12:26,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [437676860] [2019-11-20 09:12:26,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:12:26,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-20 09:12:26,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061511408] [2019-11-20 09:12:26,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 09:12:26,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 09:12:26,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 09:12:26,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-20 09:12:26,489 INFO L87 Difference]: Start difference. First operand 122 states and 139 transitions. Second operand 8 states. [2019-11-20 09:12:27,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:12:27,034 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2019-11-20 09:12:27,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 09:12:27,035 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-20 09:12:27,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:12:27,036 INFO L225 Difference]: With dead ends: 123 [2019-11-20 09:12:27,036 INFO L226 Difference]: Without dead ends: 123 [2019-11-20 09:12:27,036 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-20 09:12:27,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-20 09:12:27,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2019-11-20 09:12:27,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-20 09:12:27,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2019-11-20 09:12:27,042 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 21 [2019-11-20 09:12:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:12:27,042 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2019-11-20 09:12:27,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 09:12:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2019-11-20 09:12:27,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 09:12:27,043 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:12:27,043 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:12:27,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:27,246 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 09:12:27,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:12:27,246 INFO L82 PathProgramCache]: Analyzing trace with hash 344537593, now seen corresponding path program 1 times [2019-11-20 09:12:27,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 09:12:27,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [266209022] [2019-11-20 09:12:27,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:12:27,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 09:12:27,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:12:27,402 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 09:12:27,402 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:12:27,407 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:12:27,407 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 09:12:27,407 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 09:12:27,424 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 09:12:27,424 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:12:27,437 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:12:27,441 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 09:12:27,441 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 09:12:27,450 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:12:27,450 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 09:12:27,450 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:21 [2019-11-20 09:12:27,482 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2019-11-20 09:12:27,483 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:12:27,501 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:12:27,506 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-11-20 09:12:27,507 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 09:12:27,512 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:12:27,513 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 09:12:27,513 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:9 [2019-11-20 09:12:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:12:27,543 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 09:12:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:12:27,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [266209022] [2019-11-20 09:12:27,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:12:27,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 09:12:27,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159630499] [2019-11-20 09:12:27,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 09:12:27,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 09:12:27,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 09:12:27,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 09:12:27,750 INFO L87 Difference]: Start difference. First operand 120 states and 135 transitions. Second operand 10 states. [2019-11-20 09:12:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:12:28,884 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2019-11-20 09:12:28,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 09:12:28,885 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-20 09:12:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:12:28,886 INFO L225 Difference]: With dead ends: 118 [2019-11-20 09:12:28,886 INFO L226 Difference]: Without dead ends: 118 [2019-11-20 09:12:28,887 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-20 09:12:28,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-20 09:12:28,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2019-11-20 09:12:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-20 09:12:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2019-11-20 09:12:28,892 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 21 [2019-11-20 09:12:28,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:12:28,893 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2019-11-20 09:12:28,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 09:12:28,893 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2019-11-20 09:12:28,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 09:12:28,894 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:12:28,894 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:12:29,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:29,102 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 09:12:29,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:12:29,103 INFO L82 PathProgramCache]: Analyzing trace with hash 325784834, now seen corresponding path program 1 times [2019-11-20 09:12:29,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 09:12:29,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [464353949] [2019-11-20 09:12:29,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:12:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:12:29,359 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-20 09:12:29,360 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 09:12:29,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:12:29,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 09:12:29 BoogieIcfgContainer [2019-11-20 09:12:29,592 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 09:12:29,592 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 09:12:29,592 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 09:12:29,593 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 09:12:29,593 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:12:13" (3/4) ... [2019-11-20 09:12:29,595 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 09:12:29,649 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_267c2cc6-bbc5-48eb-b5b6-4a6087f63223/bin/uautomizer/witness.graphml [2019-11-20 09:12:29,649 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 09:12:29,653 INFO L168 Benchmark]: Toolchain (without parser) took 17233.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 189.8 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -219.5 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 09:12:29,656 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 09:12:29,656 INFO L168 Benchmark]: CACSL2BoogieTranslator took 613.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -177.2 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-11-20 09:12:29,657 INFO L168 Benchmark]: Boogie Preprocessor took 73.45 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 09:12:29,658 INFO L168 Benchmark]: RCFGBuilder took 790.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 60.0 MB). Peak memory consumption was 60.0 MB. Max. memory is 11.5 GB. [2019-11-20 09:12:29,660 INFO L168 Benchmark]: TraceAbstraction took 15695.28 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 45.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -109.7 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 09:12:29,660 INFO L168 Benchmark]: Witness Printer took 57.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 11.5 GB. [2019-11-20 09:12:29,662 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 613.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -177.2 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 73.45 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 790.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 60.0 MB). Peak memory consumption was 60.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 15695.28 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 45.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -109.7 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 57.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 556]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L522] List p, a, t; [L523] a = (List) malloc(sizeof(struct node)) VAL [a={1:0}, malloc(sizeof(struct node))={1:0}] [L524] COND FALSE !(a == 0) VAL [a={1:0}, malloc(sizeof(struct node))={1:0}] [L525] p = a [L526] int i = 0; VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, p={1:0}] [L527] COND FALSE !(i < 20 && __VERIFIER_nondet_int()) [L540] p->h = 3 VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, p={1:0}] [L541] p = a VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, p={1:0}] [L542] EXPR p->h VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, p={1:0}, p->h=3] [L542] COND FALSE !(p->h != 3) [L553] EXPR p->h VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, p={1:0}, p->h=3] [L553] COND FALSE !(p->h != 3 || i > 20) [L555] p = a VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, p={1:0}] [L556] EXPR p->n VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, p={1:0}, p->n={1:0}] [L556] COND TRUE p->n != 0 [L557] EXPR p->n VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, p={1:0}, p->n={1:0}] [L557] t = p->n [L558] free(p) VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, p={1:0}, t={1:0}] [L558] free(p) VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, p={1:0}, t={1:0}] [L558] free(p) [L559] p = t VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, p={1:0}, t={1:0}] [L556] p->n - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 106 locations, 37 error locations. Result: UNSAFE, OverallTime: 15.6s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 464 SDtfs, 1681 SDslu, 1172 SDs, 0 SdLazy, 1733 SolverSat, 206 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 326 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=122occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 302 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 175 NumberOfCodeBlocks, 175 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 286 ConstructedInterpolants, 1 QuantifiedInterpolants, 26716 SizeOfPredicates, 52 NumberOfNonLiveVariables, 598 ConjunctsInSsa, 65 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 8/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...